JPH09122140A - Operation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a failure in the case that a signal transmission element for electric insulation is broken by simple constitution, to improve reliability while securing the electric insulation and to miniaturize a device. SOLUTION: To the device main body 1 of a high-frequency electric cautery device, an electrode 2 for treatments provided with a switch 4 and a counter electrode plate 3 are connected. Photocouplers 9a and 9b for the switch for transmitting the operation signals of the switch 4 in an insulated state are provided inside the device main body 1, and when the switch 4 is operated, pulse signals from a pulse generation circuit 7 are transmitted to a control circuit 6 by the photocouplers 9a and 9b for the switch. The control circuit 6 operates an oscillator 5 by binary signals defined by the supply/stoppage of pulse signal output from the photocouplers 9a and 9b for the switch and outputs a high-frequency current.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surgical device, such as a high frequency electric scalpel device, which is used in surgery, endoscopic surgery and the like.

[0002]

2. Description of the Related Art In recent years, surgery in the medical field has become more sophisticated,
With the increase in complexity, and along with this, many surgical devices have been used, and the reliability and safety of these devices have become more important. In a surgical device, a structure for protection from dangers such as electric shock and burns is indispensable, and further safety is desired.

FIG. 9 shows a structural example of a high-frequency electric scalpel device as an example of a surgical device. Various treatment electrodes can be connected to a device main body 51 of the high-frequency electric scalpel device together with an operating foot switch 52, a counter electrode plate 53 that receives a feedback current. In the example of FIG. 9, a bipolar electrode 54 as a treatment electrode, a female electrode 55 with a switch,
Three hook electrodes 56 used in endoscopic surgery are connected. The high frequency output from these treatment electrodes can be turned on / off by the attached switch 57 for the female electrode 55 and the foot switch 52 for the other. Further, since the counter electrode plate 53 may be burned at an unintended portion unless it is securely connected to the device, means for monitoring the connection and disconnection of the counter electrode plate 53 is provided inside the device main body 51. ing.

In such a medical surgical apparatus, electrical insulation is provided to protect a patient or an operator from electric shock. In a high-frequency electric scalpel device that is electrically insulated, a photoelectric conversion element, for example, a photocoupler is generally used to transmit an operation signal of a switch that turns on and off the output of the treatment electrode to an internal output circuit. The photocoupler is designed to turn on the light-receiving side element by causing the light-emitting element inside to emit light.

Conventionally, this photocoupler is generally turned on / off using a binary signal of "1" or "0" by controlling the output side by turning on (or not turning on) a switch. Met.

[0006]

SUMMARY OF THE INVENTION In the above-mentioned configuration of the conventional surgical apparatus, in the unlikely event that the photocoupler is broken and the light receiving side outputs an ON signal even though the light emitting element is not shining, the switch is operated. The high-frequency current may continue to be output even though it is not. Similarly,
There is a possibility that the counter electrode may operate as if it is connected even though it is not connected. In order to solve this problem, there is also a method of using the photo coupler twice,
In the case of a configuration in which various electrodes and switches can be connected to the device body like the example of the high-frequency electrosurgical unit in FIG. 9, the number of photocouplers required for signal transmission is large, and more photocouplers are required. Providing such a device causes problems such as an increase in cost and an increase in size of the device.

The present invention has been made in view of these circumstances, and it is possible to prevent a defect when a signal transmission element for electrical insulation is broken by a simple structure, and to ensure reliability while ensuring electrical insulation. It is an object of the present invention to provide a surgical device which is improved in safety and is smaller in size, and which does not deviate from the operator's operation intention.

[0008]

DISCLOSURE OF THE INVENTION The present invention provides a surgical apparatus for electrical treatment, in which control is performed in a state where the terminal side circuit including the operating means and the internal circuit including the control means are electrically insulated. Signal transmission means for transmitting the signal, and the signal transmission means transmits a pulse signal so that a binary signal defined by a state in which the pulse signal exists and a state in which the pulse signal does not exist are used as the control signal. Since the signal is transmitted, it is possible to realize a signal transmission means capable of preventing a malfunction at the time of a failure with a simple configuration, and safety is enhanced.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In the present embodiment, a configuration of a high-frequency electrosurgical knife device will be described as an example of a surgical device.

FIG. 1 is a block diagram showing the configuration of a high-frequency electric knife device according to the first embodiment of the present invention.

The high-frequency electrosurgical unit comprises a device body 1 having a built-in power source and control circuit.
The treatment electrode 2 with a switch and the counter electrode plate 3 are connected to each other. The treatment electrode 2 is provided with a switch 4 for turning on / off the high frequency current output.

The apparatus body 1 includes an oscillator 5 for generating a high frequency current, a control circuit 6 for controlling the operation of each part, a pulse generating circuit 7 for generating a pulse signal for output control, and a power supply circuit for driving the pulse generating circuit 7. 8, switch photocouplers 9a, 9 for transmitting the operation signal of the switch 4 in an insulated state
b, a counter electrode monitor circuit 10 for detecting the connection state and disconnection of the counter electrode plate 3, and a counter electrode monitor photocoupler 11 for transmitting the output signal of the counter electrode plate circuit 10 in an insulated state.

The operation of the high-frequency electric knife device of the first embodiment will be described. The pulse generation circuit 7 includes a power supply circuit 8
A pulse signal is generated by receiving power supply from the pulse signal, and this pulse signal is applied to the switch 4.

When the operator holds the treatment electrode 2 in contact with the site to be treated and operates the switch 4 to turn it on, a pulse signal is transmitted via the switch 4 to the switch photocoupler 9a,
9b LED 12a, 12b, LED12
a and 12b blink according to the pulse signal. This light is received by the opposing light receiving elements 13a and 13b, and a pulse signal is sent to the control circuit 6. When the control circuit 6 receives the pulse signals from the switch photocouplers 9a and 9b, the control circuit 6 operates the oscillator 5 and outputs a high frequency current.

In this way, a high-frequency current is output from the treatment electrode 2 and returned to the counter electrode plate 3 through the living tissue, so that the portion to be treated on which the treatment electrode 2 is applied is excised by an electric knife. It can be carried out.

When the operator separates the switch 4 and turns it off, the pulse generating circuit 7 causes the switch photocouplers 9a and 9b.
Supply of the pulse signal to the LEDs 12a, 12b is stopped.
Does not emit light and the outputs from the light receiving elements 13a and 13b stop. The control circuit 6 includes switch photocouplers 9a and 9a.
When the pulse signal output from b is stopped, the oscillator 5 is stopped and the output of the high frequency current is stopped.

At this time, the connection state of the counter electrode plate 3 is monitored by the counter electrode plate monitor circuit 10, and the counter electrode plate 3 is monitored.
If there is no abnormality such as disconnection and the connection is correct,
A pulse signal is sent from the counter electrode monitor circuit 10 to the control circuit 6 via the counter electrode monitor photocoupler 11. The control circuit 6 activates the oscillator 5 by the output of the counter plate monitor photocoupler 11. If the counter electrode plate 3 is abnormal, the pulse signal output from the counter electrode plate monitor circuit 10 is stopped. The control circuit 6 inhibits the operation of the oscillator 5 when the output of the counter plate monitor photocoupler 11 is stopped.

In the present embodiment, a photocoupler for a switch or a counter plate monitor is operated by using a pulse signal,
The output of the high frequency current is controlled by a binary signal defined by the state in which the pulse signal output from the photo coupler is present and the state in which it is not. With this configuration, it is possible to prevent an abnormal condition such as the output of the high-frequency current continues to be output due to the failure of the photo-coupler and the photo-coupler output remains in the ON state even when the switch is not operated. It is possible to improve.

As a modification of the first embodiment, the same effect can be obtained by using the pulse transformer 15 instead of the photocoupler as shown in FIG.

FIG. 3 is a block diagram showing the configuration of a high-frequency electric knife device according to the second embodiment of the present invention.

The second embodiment is a structural example of a high-frequency electrosurgical unit which can be used by connecting two treatment electrodes.

In the main body 21 of the high frequency electric knife device,
The bipolar electrode 22 and the monopolar electrode 23 are connected as a treatment electrode, and the counter electrode plate 24 is connected for current feedback of the monopolar electrode 23.

The apparatus body 21 includes a power amplifier 25 for generating a high frequency signal for an electric knife, a control circuit 26 for controlling the operation of each part, an operation panel 27 for the operator to set the operation, and an output for bipolar output. A transformer 28, an output transformer 29 for monopolar output, and relays 30a, 30b, 30c for switching the high frequency signal are provided.

The operation of the high frequency electric knife device of the second embodiment will be described. The operator first selects, using the operation panel 27, whether to use a monopolar electrode or a bipolar electrode. The selection result is sent from the operation panel 27 to the control circuit 26, and the control circuit 26 operates the relays 30a, 30b, 30c based on the selection result output.

When the bipolar electrode is selected, the contact of the relay 30a is on the upper side, the contact of the relay 30b is closed, and the contact of the relay 30c is open. As a result, the high frequency signal generated by the power amplifier 25 is transmitted to the relay 30.
It is supplied only to the bipolar electrode 22 through the bipolar output transformer 28 through the two contacts a and 30b.

When a monopolar electrode is selected,
The contact of the relay 30a is on the lower side, the contact of the relay 30b is open, and the contact of the relay 30c is closed. As a result, the high frequency signal generated by the power amplifier 25 is transmitted to the relay 3
It is supplied only to the monopolar electrode 23 through the output contacts 29 for the monopolar through the two contacts 0a and 30c.

In the present embodiment, in a device which can be used by connecting two electrodes of a bipolar and a monopolar, it is necessary to switch between high frequency current output and ON / OFF of each supply line.
The output is controlled using two relays. According to this configuration, the high frequency current is always output through the two contacts, so that even if one of the relays should fail, the high frequency current will not be output to the electrode on the unintended side. Therefore, even when multiple electrodes are connected to the device in advance, it is possible to easily select and use the electrode that outputs the high frequency current by operating the panel, and it is possible to reliably prevent erroneous output due to failure etc. It becomes possible to improve.

FIG. 4 shows a modification of the second embodiment. In this modification, the relays 30b and 30c for turning on and off the high frequency current supply line are arranged on the primary side of the output transformers 28 and 29 for the respective electrodes. Even with such a configuration, the same operational effect as that of the second embodiment can be obtained.

FIG. 5 is a block diagram showing the configuration of a high-frequency electric scalpel device according to the third embodiment of the present invention.

The third embodiment is a structural example of a high-frequency electrocautery device which can be used by connecting a plurality of types of monopolar electrodes.

In the main body 31 of the high frequency electric knife device,
The switch-equipped electrode 32 and the hook electrode 33 are connected as a monopolar electrode, and the counter electrode plate 34 is connected for current feedback of these electrodes.

The apparatus main body 31 includes a power amplifier 35 for generating a high frequency signal for an electric knife, a control circuit 36 for controlling the operation of each part, a foot switch 37 for turning on / off the output to the hook electrode 33, and an electrode 32 with a switch. A switch detection circuit 38 for detecting the state of the attached switch, an output transformer 39 for outputting a high frequency signal, and relays 40a, 40b, 40c for switching the high frequency signal are provided.

When the switch-equipped electrode 32 is used,
When the operator operates a switch provided on the electrode, the switch detection circuit 38 detects the detection signal, and the detection signal is output to the control circuit 36.
Sent to The control circuit 36 uses the detection signal to relay 40
a, 40b, 40c are operated, and the high frequency signal from the power amplifier 35 passes through the output transformer 39 and the relay 40
It is supplied only to the electrode 32 with a switch via a and the relay 40b.

When the hook electrode 33 is used,
When the operator operates the foot switch 37, a switch signal is sent to the control circuit 36. The control circuit 36 operates the relays 40a, 40b, 40c by the switch signal, and the high frequency signal from the power amplifier 35 is supplied only to the hook electrode 33 through the output transformer 39 and the relays 40a, 40c.

Also in the device which can be used by connecting a plurality of types of monopolar electrodes as in the present embodiment, as in the second embodiment, 3 for switching the high frequency current output and for turning on / off each supply line. By adopting a configuration in which the output is controlled using two relays, the high frequency current is always output through two contacts, so even if one of the relays fails, the high frequency current will flow to the electrode on the unintended side. It will not be output and the safety can be further improved.

FIG. 6 is a block diagram showing the configuration of a high-frequency electric scalpel device according to the fourth embodiment of the present invention.

The fourth embodiment is a structural example of an electric scalpel device equipped with a high-frequency current feedback rate detecting means.

The high frequency electrosurgical knife device 61 comprises a monopolar electrode 62 as a treatment electrode and a counter electrode plate 63 for current feedback.
And are connected. The high frequency electric knife device 61 includes a power amplifier 64 for generating a high frequency signal for the electric knife, a control circuit 65 for controlling the operation of each part, an output transformer 66 for outputting a high frequency signal, and a monopolar electrode 6.
Current sensors 67a, 67b and current sensors 67a, 67 for detecting the active current to 2 and the return current from the counter plate 63.
Rectifier circuits 68a, 68 for exchanging the output of b into a DC signal
b, 68c, 68d, an analog arithmetic circuit 69 for obtaining an output error of the current sensors 67a, 67b based on the outputs of the rectifying circuits 68a, 68b by an analog arithmetic operation, the rectifying circuit 68
An analog / converts the output of c, 68d into a digital signal
The current sensor 6 is based on the outputs of the digital converters 70a and 70b and the analog / digital converters 70a and 70b.
A digital operation circuit 71 is provided which calculates the output error of 7a and 67b by digital operation.

The operation of the high-frequency electric scalpel device of the fourth embodiment will be described. When performing treatment with an electric scalpel using the monopolar electrode 62, the high frequency signal generated by the power amplifier 64 is supplied to the monopolar electrode 62 via the output transformer 66, the current sensor 67a, and the treatment target site. Given. This high frequency current is collected by the counter electrode plate 63 through the living tissue, and returns to the output transformer 66 through the current sensor 67b.

The detection results by the current sensors 67a and 67b for active current detection and feedback current detection should be the same in the ideal state, but the current values of the active component and the feedback component are different due to the occurrence of some failure. If a different state occurs, it is considered that there is a leakage of current to an unintended path, and it is necessary to take measures such as stopping the output.

Therefore, in this embodiment, the output signals of the respective current sensors 67a and 67b are first fed to the rectifier circuit 68.
A and 68b are converted into a direct current, and the analog arithmetic circuit 69 performs an arithmetic operation to obtain the difference or ratio between them, thereby detecting an abnormal state and transmitting it to the control circuit 65.

Simultaneously with the abnormality detection by the analog calculation, the rectifier circuits 68c and 68d convert the current into direct current and then send the analog / digital converters 70a and 70b to digitalize it, and the digital calculation circuit 71 also performs the calculation.
The current sensor 67 is calculated by the calculation of the digital calculation circuit 71.
By obtaining the difference or the ratio of the output signals of a and 67b, the abnormal state is also detected from the digital operation result and transmitted to the control circuit 65.

In this embodiment, the feedback ratio of the high frequency current is detected by calculating the error for the feedback by using the two-system arithmetic circuit of analog and digital. According to this configuration, even if a failure occurs in one of the arithmetic circuits, the abnormal state can be detected in the other, so that the redundancy of the feedback rate detection is increased, and the feedback rate detection can be reliably performed. It is possible to further improve the safety.

FIG. 7 is a block diagram showing the structure of a high-frequency electric knife device according to the fifth embodiment of the present invention.

The fifth embodiment shows another example of the configuration of an electric knife device provided with a high-frequency current feedback rate detecting means. The same components as those in the fourth embodiment shown in FIG. 6 are designated by the same reference numerals and the description thereof will be omitted.

The high frequency electric knife device 75 of this embodiment is
This is a modification of the configuration of the arithmetic circuit for detecting the feedback rate, in which an analog division circuit 76 is provided at the rear stage of the rectifier circuits 68a and 68b, and an analog differential arithmetic circuit 77 and a comparator 78 at the rear stage of the rectifier circuits 68c and 68d. Is provided.

One of the detection results of the current sensors 67a and 67b is converted into a direct current by the rectifier circuits 68a and 68b, the ratio of the active component and the feedback component is obtained by the analog division circuit 76, and an abnormality is detected by this ratio. . The other is rectified by the rectifier circuits 68c and 68d, and the difference between the active component and the feedback component is obtained by the differential operation (subtraction) by the analog differential operation circuit 77 and the comparator 78, and the abnormality is sensed by this difference.

As described above, in the present embodiment, two operations of division and subtraction are performed from the detection result of the active component and the feedback component of the high frequency current to judge the abnormality of the current feedback ratio, and the information is transmitted to the control circuit. Has become. According to this configuration, the fourth
In addition to the effect of the embodiment described above, the feedback ratio of the high frequency current can be monitored by different judgment criteria, and the safety can be improved.

FIG. 8 is a block diagram showing the structure of a high-frequency electric scalpel device according to the sixth embodiment of the present invention.

The sixth embodiment shows still another configuration example of the electric scalpel device provided with the high-frequency current feedback rate detecting means. The same components as those in the fourth embodiment shown in FIG. 6 are designated by the same reference numerals and the description thereof will be omitted.

The high frequency electric scalpel device 81 of this embodiment is
The configuration of the arithmetic circuit for detecting the feedback ratio is changed, and the analog / digital converters 70a, 70b and the digital arithmetic circuit 7 are provided at the subsequent stage of the rectifier circuits 68a, 68b.
1 is provided, and also voltage dividing circuits 82a and 82b, comparators 83a and 83b, and an OR circuit 84 are provided.

The detection results of the current sensors 67a, 67b are converted into direct currents by the rectifier circuits 68a, 68b, then first digitized by the analog / digital converters 70a, 70b, and then arithmetically operated by the digital arithmetical circuit 71. When there is a state, the information is transmitted to the control circuit 65.
Further, the output signals of the rectifier circuits 68a and 68b are compared with, for example, a signal obtained by halving the voltage via the voltage dividing circuits 82a and 82b by comparators 83a and 83b, and an abnormal state is detected. The outputs of the comparators 83a and 83b are transmitted to the control circuit 65 via the OR circuit 84.

The abnormality detecting operation will be described in detail below. Here, if some abnormality occurs, the counter plate 63
The magnitude of the feedback current (Ip) from the monopolar electrode 6
It is assumed that the active current (Ia) to 2 is less than half of the active current (Ia). This phenomenon occurs when the stray capacitance 85 between the counter electrode line and the ground and the stray capacitance 86 between the active electrode line and the ground or between the patient and the ground increase.

The active current Ia is converted into a direct current by the rectifier circuit 68a and becomes a voltage value Va, and the comparator 83a as it is.
Is also input to the comparator 83b. On the other hand, similarly, the feedback current Ip is also converted into a direct current by the rectifier circuit 68b and becomes a voltage value Vb, which is input to the comparator 83b as it is, and is also halved by the voltage dividing circuit 82b and input to the comparator 83a.

If the voltage values Va and Vb are substantially equal to each other, the output of the comparator 83b is at a low level. However, as previously assumed, when the feedback current is less than half the active current, that is, Vb <1 / 2Va. Then, the output of the comparator 83b becomes high level. Also, the active current Ia
If the magnitude relation between the feedback current Ip and
An abnormal state is detected by 3a.

When the output of either of the comparators 83a and 83b becomes high level, the output of the OR circuit 84 becomes high level, which is used as the abnormality detection signal by the control circuit 65.
Conveyed to. Upon receiving the abnormality detection signal, the control circuit 65 stops the output of the high frequency current or issues an alarm to warn the operator.

In this embodiment, as the feedback rate detection of the high frequency current, the feedback rate detection by digital calculation and the abnormality detection by the voltage dividing circuit and the comparator are performed. With this configuration, it is possible to use the digital calculation to make a fine determination of the feedback rate and to use the comparator to detect a dangerous state, and to use the comparator as an auxiliary means of the digital calculation circuit when a failure occurs. It is also possible to improve safety.

In each of the above-described embodiments, the configuration example of the high-frequency electric scalpel device is shown as the surgical device, but the configuration of the present invention can be similarly applied to other surgical devices that perform electrical treatment. is there.

[Supplementary Notes] (1) In a surgical device for electrical treatment, a control signal is transmitted in an electrically insulated state between a terminal side circuit including an operating means and an internal circuit including a control means. And transmitting a pulse signal to transmit a binary signal defined by a state where the pulse signal is present and a state where the pulse signal is absent, as the control signal. A surgical device characterized by being present.

(2) In a surgical apparatus for electrical treatment, energy generating means for generating energy necessary for treating a surgical site, treatment means for supplying the energy to the surgical site, and energy from the treatment means. Switch means for turning on / off the output of the switch means, and signal transmitting means for transmitting an operation signal from the switch means to the energy generating means, the signal transmitting means, in an electrically insulated state, transmits a pulse signal. A surgical apparatus, wherein a binary signal defined by a state in which the pulse signal is present and a state in which the pulse signal is absent is transmitted as the operation signal.

(3) The surgical apparatus according to appendix 1 or 2, wherein the signal transmitting means is a photocoupler.

(4) The surgical apparatus according to appendix 1 or 2, wherein the signal transmitting means is a pulse transformer.

(5) The surgical apparatus according to appendix 1 or 2, wherein the treatment means is a high-frequency electric scalpel means for performing an excision treatment by supplying a high-frequency current to the surgical site.

(6) In a surgical device for performing electrical treatment, which has a plurality of output terminals for supplying energy required for treatment to the treatment means, output switching means for switching energy supply to the plurality of output terminals Is connected to the output end via at least two switching means.

(7) In a surgical apparatus for supplying a high frequency current to a surgical site for electrical treatment, a current detecting means for detecting an output state of the high frequency current and an abnormal state based on a detection result of the current detecting means. An abnormality detection unit comprising two or more different determination units for determining the above.

[0066]

As described above, according to the present invention, it is possible to prevent a trouble when the signal transmission element for electrical insulation is broken with a simple structure, and to improve reliability while ensuring electrical insulation. At the same time, there is an effect that it is possible to provide a surgical device that is smaller in size and that does not deviate from the operator's operating intention and that has improved safety.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of a high-frequency electric scalpel device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a modified example of the first embodiment.

FIG. 3 is a block diagram showing the configuration of a high-frequency electric scalpel device according to a second embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a modified example of the second embodiment.

FIG. 5 is a block diagram showing the configuration of a high-frequency electric scalpel device according to a third embodiment of the present invention.

FIG. 6 is a block diagram showing the configuration of a high-frequency electric scalpel device according to a fourth embodiment of the present invention.

FIG. 7 is a block diagram showing the configuration of a high-frequency electric scalpel device according to a fifth embodiment of the present invention.

FIG. 8 is a block diagram showing the configuration of a high-frequency electric scalpel device according to a sixth embodiment of the present invention.

FIG. 9 is a structural explanatory view showing a structural example of a high-frequency electric scalpel device as an example of a surgical device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Device main body 2 ... Treatment electrode 3 ... Counter electrode 4 ... Switch 5 ... Oscillator 6 ... Control circuit 7 ... Pulse generation circuit 8 ... Power supply circuit 9a, 9b ... Switch photo coupler 10 ... Counter plate monitor circuit 11 ... Counter plate Photocoupler for monitor 12a, 12b ... LED 13a, 13b ... Light receiving element

Claims (1)

[Claims] 1. A surgical instrument for electrical treatment, which transmits a control signal in an electrically insulated state between a terminal side circuit including an operating means and an internal circuit including a control means. Wherein the signal transmitting means transmits a pulse signal, thereby transmitting a binary signal defined by a state where the pulse signal is present and a state where the pulse signal is absent, as the control signal. And surgical equipment.